AT&T 9312 - Manual (Page 22)

BATTERIES
20
Spare Battery Charger
This phone is equipped with a built-in spare battery charger in the base
unit. The spare battery charger allows you to always have a charged
battery available should the handset battery charge become low.
To install the spare battery pack (purchased separately,
Replacement Battery #3301, AT&T SKU# 91076):
1 Open the base unit spare battery compartment.
2 Plug battery pack
connector into base.
Place the spare
battery pack and its
wires in the
compartment.
3 Replace the spare battery compartment cover.
4 When the battery is installed properly, the SPARE BATTERY light on the
base will be on.
5 The spare battery will be fully charged after 16 hours.
Spare battery
compartment
cover
Spare battery
compartment